Fix gcc.c-torture/execute/20101011-1.c on 64-bit Niagara

[Eric Botcazou]

This fixes

FAIL: gcc.c-torture/execute/20101011-1.c   -O2  execution test
FAIL: gcc.c-torture/execute/20101011-1.c   -O2 -flto -fno-use-linker-plugin -
flto-partition=none  execution test
FAIL: gcc.c-torture/execute/20101011-1.c   -O2 -flto -fuse-linker-plugin -fno-
fat-lto-objects  execution test
FAIL: gcc.c-torture/execute/20101011-1.c   -O3 -g  execution test
FAIL: gcc.c-torture/execute/20101011-1.c   -Os  execution test

on 64-bit SPARC with -mcpu=niagara.  There is exactly the same guard a few 
lines below for the DIV case.

Tested on SPARC64/Linux and x86-64/Linux, applied on the mainline.


2017-06-14  Eric Botcazou  <ebotca...@adacore.com>

        * simplify-rtx.c (simplify_binary_operation_1) <UDIV>: Do not simplify
        a division of 0 if non-call exceptions are enabled.

-- 
Eric Botcazou
Index: simplify-rtx.c
===================================================================
--- simplify-rtx.c	(revision 249091)
+++ simplify-rtx.c	(working copy)
@@ -3194,7 +3194,8 @@ simplify_binary_operation_1 (enum rtx_co
 
     case UDIV:
       /* 0/x is 0 (or x&0 if x has side-effects).  */
-      if (trueop0 == CONST0_RTX (mode))
+      if (trueop0 == CONST0_RTX (mode)
+	  && !cfun->can_throw_non_call_exceptions)
 	{
 	  if (side_effects_p (op1))
 	    return simplify_gen_binary (AND, mode, op1, trueop0);